Locomotive stoker



June 18, 1929. N. M. LOWER LOCOMOTIVE STOKER Original Filed July 26, 1926 Patented June 18, 1929.

UNITED STATES PATENT owner-1.

NATHAN M. LOWER, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO THE STANDARD STOKER COMPANY INC., 01 NEW YORK, N. Y., A COR- PORATION OF DELAWARE. H

LOCOMOTIVE STOKER.

. Original application filed July 26, 1826, Serial 110.124372. Divided and this application filed November 28, 1927. Serial No. 236,029.

This application is a division of my ending application, Serial No. 124,872, filed J uly 26, 1926, for improvements in locomotive stokers.

5 The invention relates to locomotive stokers of the scatter feed type, and its objects are to secure, with simplicity of construction, high efliciency and durability.

In the accompanying drawings illustrating a preferred form of the invention Fig. 1 is a detail, central, vertical, longitudinal section of a locomotive and of the improved stoker;

Fig. 2 is a lan view artly in section on the line 2--2 of ig. 1; and

Fig. 3 is a view on the line 3-3 of Fig. 1.

At 10, there is shown a backhead of the firebox of the locomotive and, as is usual, it is hollow, constituting a water leg of the boiler. A. portion of the grate of the firebox is shown at 11. The deck or floor of the locomotive cab is shown at 12 and the seat for the fireman is indicated at 13. p

The backhead 10 is provided with the usual hand firing opening 14 and the section of the backhead immediately below this opening and extending to the mud ring 15 is offset inwardly as shown at 16. A distorted ring 17 is fitted within the backhead 10 and between its innerand outer sheets and follows the contour of the openin 14 and the top of the offset section 16. T e mud ring 15 is shown as distorted inwardly to follow the contour of the offset section 16.

The ofiset 16 encloses an alcove or chamber exteriorly open and at its upper end communicating with the firebox. Within this chamber, there is housed a curved fuel riser conduit 18, its upper end terminating approximately at the top of the offset 16. Preferabl the upper margm of the offset 16 inclines ownwardly from its juncture with the undistorted portion of the backhead, and the riser conduit 18 projects, as shown, a little above its lowest point. The riser conduit 18 is suitably supported as by means of a web '19 which projects downwardly and forwardly and rests u on and is secured to the outer sheet'of'the 0 set 16. The web 19 is shown as provided with lateral flanges 20, 21 which seat against the outer wall of the oflset and are secured thereto by means of bolts or rivets.

.duit, and serves not onl The lower end of the riser conduit 18 proferably terminates ap roximately at the plane of the outer sheet oi the backhead 10 and opens backwardly and is laterally flanged as shown.

A transfer conduit 22 leading forwardly from the tender (not shown) delivers to the riser conduit 18 and is attached thereto by a ball and socket joint, the outer element 23 of which is secured to the lateral flange of the riser conduit and the inner member 24 of which is in the form of a ring secured to the forward end of the transfer conduit.

A conveyor screw 25 housed within the conduit 22, and driven from its rearward end, in accordance with common practice, terminates at the forward end of the transfer con-- to move the fuel therethrough, but to orce it upwardly throu h the riser conduit 18.

A p etc 26 extends laterally from the upper margin of the riser conduit 18, with which it may be cast integrally although, as shown, it is preferably a separate element apertured to fit upon the riser conduit. The plate 26 is preferably level and serves as a table over which the fuel issuing from the riser conduit may be swept by steam jets issuing from the nozzle 27 located on the upper surface of the plate 26 at the rearward side of the riser conduit. Suitable steam pipes, as shown, lead to the nozzle 27. The plate 26 is shown as provided with downstanding flanges 28, 28, whichrest upon the upper margin of the offset 16, and its upper surface may be provided with curved flanges as 29, suitably disposed and shaped to' uide a portion of the fuel to the back part 0 the firebox.

An apertured plate 30 is secured to the outer sheet of the backhead 10, and extends downwardly to the deck 12. The aperture 31 of this plate defines the hand firing openin 14 in the backhead and to this plate the usua door (not shown) for closing this opening may be attached. The plate 26 is provide at its rearward margin with a downstanding flan e 32-which seats against and is attached to t e plate 30, thereby firmly securing the plate 26 in osition and contributing to the su port of t e riser conduit.

e portion of the chamber enclosed by the offset 16, below the deck 12, is externally open and the plate 26, this current of air protecting the plate 26 and its-supporting flanges 28 'against the intense heat developed in the firebox. The 'riserf'conduit is made slightly smaller than the cross sectional dimension of this chamber to permit the inflow of a suflicient volume of air for the purpose mentioned.

The offset 16 being formed as a part of the backheadblO is protected from the heat by the circulation of water therethrough.

By the construction described, fuel delivered by mechanical means is brou ht into the firebox at. the same level as i there ore, .at suitable hei ht for distribution over the entire surface 0 the grate 11. The stoker mechanism, which includes the offset 16, encroaches so slightly upon the'firebox space that the effective area of the grate surface is not diminished to such an extent as to appreciably reduce the furnace capacity.

Bly jointing the fuel transfer conduit direct y to the riser conduit, the former may be made without intermediate joints, its rearward end being loosely mounted upon a proper support under the floor of the tender in accordance with common practice.

Iclaim as my invention L'In a locomotive stoker in combination, a boiler havin a hollow backhead, a section of the bac head being inwardly offset to enclose a fuel receiving chamber opening upwardly, a conduit housed within such chamber, its upper end being open, a plate extending laterally from the upper end of the conduit and covering the upper mar 'n of the backhead offset, and means for de 1vfiring fuel to and forcing it'through the conuit.

2. In a locomotive stoker, in combination, a boiler having a hollow backhead, a section of the backhead being inwardly offset to enclose a fuel receiving chamber opening upwardly, a conduithoused within such chamber, its upper end being open, a plate ex delivered. throu h the usual hand firing opening and is,

tending laterally from the upper end of the conduit over and spacedfrom the upper margin of the back ead offset, and means for delivering fuel to and forcing it through the conduit.

3. In a locomotive stoker, in combination, a boiler having a hollow backhead, a section of the backhead being inwardly offset to enclose a fuel receiving chamber opening upwardly, a conduit housed within such c amber, its upper end bein open, a plate extending laterally from t e upper end of the conduit over and s aced from the upper margin of the bac ead offset, flanges on such plate for resting u on the offset, and means'for delivering fue to and forcing it throu h the conduit. 4

4. l n a locomotive stoker, in combination, a boiler having a backhead provided with a hand firing opening, the section of the backhead immediately below such opening being inwardly offset to enclose a fuel receivin chamber opening upwardly, a plate secure to "the outer face 0 thebackhead and having an aperture registering with the hand firing opening, the lower margin of its aperture defining the bottom of such opemng such late terminatin above the bottom of the c amber, a tubufiar conduit extending through the chamber, its lower end facing backwardly below the named plate, and means for delivering fuel to and forcing it throu h the conduit.

5. a locomotive stoker, in combination, a boiler having a hollow backhead, a section of the backhead being inwardly offset to enclose a fuel receiving chamber openin upwardly, a, conduit housed within such c amber, its upper end bein open, a plate extending laterally from t e upper end of the conduit over the upper margin of the backhead ofi'set, means for delivering fuel to and forcing it through the conduit, and a steam nozzle located at the rearward side of the upper end of the conduit for delivering steam jets over the surface of the plate.

In testimony whereof I afiix my signature.

, NATHAN. M. LOWER. 

